US2989938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salvage apparatus for damaged ships and airplanes
Assignee: Individual
•
Filing: 1957-04-01
•
Granted: 1961-06-27
•
Expires: 1977-04-01
Abstract
No abstract record available.
Inventors
- 👤 John D Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:51
CPC Classifications
B; B63; B63C; B63C7/00; B63C7/06; B63C7/12; B64; B64C; B64C35/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1704612A
Cited
US867983A
Cited
US908016A
Cited
US1156792A
Cited
US2073688A
Cited
US2417508A
Cited
US2653139A
Cited
US2764565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |